Back in December, Microsoft demoed how it was unifying Lync – it’s old business-centric video chat app – and Skype into a singular Skype for Business product, with the promise of giving organizations reach to Skype users outside of their business’ walls. Now it’s offering up a technical preview, which it announced at its Convergence conference today. Lync customers can trial it to get ready for the full transition to Skype. Skype for business is obviously based on Skype’s design, but pulls in many of Lync’s features, such as online meetings, enterprise-grade security and compliance and control tools for IT departments.…

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